[release-4.17]: OKD-226: Dockerfile.rhel7: Add ARG TAGS=ocp

[Prashanth684]

Manual cherry-pick of #687 since auto cherry-pick was leading to a conflict.

[openshift-ci-robot]

@Prashanth684: This pull request references OKD-226 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the bug to target the "4.17.0" version, but no target version was set.

In response to this:

Manual cherry-pick of #687 since auto cherry-pick was leading to a conflict.

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[ausil]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ausil, Prashanth684
Once this PR has been reviewed and has the lgtm label, please assign deads2k for approval. For more information see the Kubernetes Code Review Process.

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[Prashanth684]

/test e2e-operator

[xingxingxia]

/label cherry-pick-approved

[ausil]

/assign deads2k

[ausil]

/test e2e-operator

[Prashanth684]

/test e2e-operator

[Prashanth684]

@deads2k could you stamp an approval for this please?

[openshift-ci]

@Prashanth684: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-operator	36a9412	link	true	/test e2e-operator

Full PR test history. Your PR dashboard.

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